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Oilbird
The oilbird (''Steatornis caripensis''), locally known as the ''guácharo'', is a bird found in the northern areas of South America (including the island of Trinidad in the Republic of Trinidad and Tobago). They are nocturnal feeders on the fruits of the oil palm and tropical laurels, and are the only nocturnal flying fruit-eating birds in the world (the kakapo is flightless). They forage at night, navigating by echolocation in the same way as bats, but with a high-pitched clicking sound of around 2 kHz that is audible to humans.〔Snow (2008), pp. 137-143.〕
==Description==
This is a large, slim bird at , with a wing span of . It has a flattened, powerfully hooked, bill surrounded by deep chestnut rictal bristles up to long. Adults weigh but the chicks can weigh considerably more, at up to , when their parents feed them a good deal of fruit before they fly.〔Burnie D and Wilson DE (Eds.), ''Animal: The Definitive Visual Guide to the World's Wildlife''. DK Adult (2005), ISBN 0789477645〕 It is mainly reddish-brown with white spots on the nape and wings. Lower parts are cinnamon-buff spotted with white. The stiff tail feathers are a rich brown spotted with white on either side. The feet are small and almost useless, other than for clinging to vertical surfaces. The long wings make it capable of hovering and twisting flight, which enables it to navigate through restricted areas of its caves.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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